feat: kotlin bindings

.github/workflows/uniffi-version-bump.yaml

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+name: "Release: Uniffi"
+
+env:
+  WORKING_DIRECTORY: bindings/uniffi
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version'
+        required: true
+        default: 'patch'
+        type: choice
+        options:
+          - patch
+          - minor
+          - major
+
+permissions:
+  contents: write
+
+jobs:
+  publish:
+    name: Version
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ${{ env.WORKING_DIRECTORY }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          persist-credentials: false
+
+      - name: Set Git author
+        run: |
+          git config user.name "Bot"
+          git config user.email "bot@gorules.io"
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+
+      - name: 'Install dependencies'
+        run: pip install --upgrade bump2version
+
+      - name: Bumpversion
+        run: bumpversion ${{ github.event.inputs.version }} --allow-dirty --tag-name "uniffi-v{new_version}"
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push changes
+        uses: ad-m/github-push-action@v0.6.0
+        with:
+          github_token: ${{ secrets.PAT}}

.github/workflows/uniffi.yaml

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+name: UniFFI
+env:
+  UNIFFI_DIRECTORY: bindings/uniffi
+
+on:
+  push:
+    branches:
+      - master
+    tags-ignore:
+      - '**'
+    paths:
+      - '../../bindings/uniffi/**'
+      - 'core/**'
+      - 'test-data/**'
+      - '.github/workflows/uniffi.yaml'
+  pull_request:
+    paths:
+      - '../../bindings/uniffi/**'
+      - 'core/**'
+      - 'test-data/**'
+      - '.github/workflows/uniffi.yaml'
+
+jobs:
+  build:
+    if: "!contains(github.event.head_commit.message, 'skip ci')"
+    env:
+      OUTPUT_NAME: zen_uniffi
+
+    strategy:
+      fail-fast: true
+      matrix:
+        settings:
+          - host: windows-latest
+            target: 'x86_64-pc-windows-msvc'
+            output: '{0}.dll'
+            lib_dir: 'win32-x86-64'
+          - host: macos-latest
+            target: 'x86_64-apple-darwin'
+            output: 'lib{0}.dylib'
+            lib_dir: 'darwin-x86-64'
+          - host: macos-latest
+            target: 'aarch64-apple-darwin'
+            output: 'lib{0}.dylib'
+            lib_dir: 'darwin-aarch64'
+          - host: ubuntu-latest
+            target: 'x86_64-unknown-linux-gnu'
+            output: 'lib{0}.so'
+            lib_dir: 'linux-x86-64'
+          - host: ubuntu-latest
+            target: 'aarch64-unknown-linux-gnu'
+            output: 'lib{0}.so'
+            lib_dir: 'linux-aarch64'
+
+    name: UniFFI - ${{ matrix.settings.target }}
+    runs-on: ${{ matrix.settings.host }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Rust Toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          target: ${{ matrix.settings.target }}
+
+      - name: Build
+        uses: houseabsolute/actions-rust-cross@v1
+        with:
+          working-directory: ${{ env.UNIFFI_DIRECTORY }}
+          target: ${{ matrix.settings.target }}
+          args: '--lib --release'
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.settings.lib_dir }}
+          path: target/${{ matrix.settings.target }}/release/${{ format(matrix.settings.output, env.OUTPUT_NAME) }}
+          if-no-files-found: error
+
+  release-java-kotlin:
+    runs-on: ubuntu-latest
+    needs: [ build ]
+    if: "startsWith(github.event.head_commit.message, 'chore(release): publish uniffi')"
+    defaults:
+      run:
+        working-directory: ${{ env.UNIFFI_DIRECTORY }}
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Rust Toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Validate Gradle wrapper jar
+        uses: gradle/actions/wrapper-validation@v3
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: build/generated/resources
+
+      - name: Move artifacts
+        run: mv ../../build ./
+
+      - name: Generate Kotlin sources
+        run: |
+          cargo run --bin uniffi-bindgen -- generate \
+            --library build/generated/resources/darwin-x86-64/libzen_uniffi.dylib \
+            --language kotlin \
+            --out-dir build/generated/kotlin
+
+      - name: Install uniffi-bindgen-java
+        run: cargo install uniffi-bindgen-java
+
+      - name: Generate Java sources
+        run: |
+          uniffi-bindgen-java generate \
+            --library build/generated/resources/darwin-x86-64/libzen_uniffi.dylib \
+            --out-dir build/generated/java
+
+      - name: Print directory tree
+        run: tree build
+
+      - name: Publish Maven Artifact
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          GPG_SIGNING_KEY: ${{ secrets.GPG_SIGNING_KEY }}
+          GPG_SIGNING_PASSPHRASE: ${{ secrets.GPG_SIGNING_PASSPHRASE }}
+        run: ./gradlew publishAllPublicationsToCentralPortal

bindings/uniffi/.bumpversion.cfg

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+[bumpversion]
+current_version = 0.1.10
+commit = True
+tag = True
+message = chore(release): publish uniffi
+
+[bumpversion:file:Cargo.toml]

bindings/uniffi/.gitignore

@@ -0,0 +1,3 @@
+.idea
+.gradle
+build/

bindings/uniffi/Cargo.toml

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+[package]
+name = "zen-uniffi"
+version = "0.1.10"
+edition = "2024"
+license = "MIT"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[[bin]]
+name = "uniffi-bindgen"
+path = "uniffi-bindgen.rs"
+
+[dependencies]
+uniffi = { version = "0.29", features = ["tokio", "cli"] }
+serde_json = { workspace = true }
+zen-engine = { path = "../../core/engine" }
+zen-expression = { path = "../../core/expression" }
+serde = { workspace = true, features = ["derive"] }
+async-trait = "0.1"
+tokio = "1.46"
+
+[build-dependencies]
+uniffi = { version = "0.29", features = ["build"] }

bindings/uniffi/Makefile

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+# Just for local testing, at the moment it relies on .dylib (Mac), feel free to change below
+build:
+	cargo build --lib --release
+	@mkdir -p build/generated/resources
+	cp -f ../../target/release/libzen_uniffi.dylib build/generated/resources/libzen_uniffi.dylib
+
+generate-java:
+	uniffi-bindgen-java generate \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--out-dir build/generated/java
+
+generate-kotlin:
+	cargo run --bin uniffi-bindgen generate \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--language kotlin \
+		--out-dir build/generated/kotlin
+
+generate-csharp:
+	uniffi-bindgen-cs \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--out-dir build/generated/csharp
+
+all: build generate-java generate-kotlin generate-csharp
+
+.PHONY: all build generate-java generate-kotlin generate-csharp